Scientific research shows that the range of seed weight distribution is an important indicator to evaluate the seed quality. Measuring the weight spectral distribution need to measure each seed weight, count the number of seeds in each interval, and then draw the weight spectrum. In order to free researchers from this tedious, time-consuming and strenuous work, this paper intends to study the automatic weighing system of crop seeds, and design a automatic weighing system for wheat seed. The system consists ...